Apparatus for distributing stock to the cylinder of paper machines



April 30, 1946. v J. EDGE 2,399,546

APPARATUS FOR DISTRIBUTING STOCK TO THE CYLINDER OF PAPER MACHINES Filed Aug. 20, 1942 s Sheets-Sheet 1 April 30, 1946. J. EDGE 2,399,546

APPARATUS FOR DISTRIBUTING STOCK TO THE CYLINDER OF PAPER MACHINES Filed Aug. 20, 1942 Sheets-Sheet 2 Hx\ I R J. EDGE April 30, 1946.

APPARATUS FOR DISTRIBUTING STOCK TO THE CYLINDER OF PAPER MACHINES Fi led Aug. 20, 1942 3 Sheets-Sheet 3 hitented Apr. 30, 1946 APPARATUS FOR DISTRIBUTING STOCK TO THE CYLINDER OF PAPER MACHINES Jacob Edge, Downingtown, Pa., assignor to Downingtown Manufacturing Company, Downingtown, Pa., a corporation of Pennsylvania Application August 20, 1942, Serial No. 455,500

Claims.

This invention relates to paper making apratus and more particularly to a stock distribution system for particular use in conjunction with cylinder paper machines of the multiple vat type.

An important object of the invention is the provision of a stock distribution system materially facilitating the control of stock by the machine tender and which will, to a great extent, eliminate the passage of non-uniform stock to the screens. In the ordinary cylinder machine, the distributing box, by means of which the liner and filler are distributed by gravity to the cylinder molds, is located well above the machine in a hot and humid atmosphere. Adjustment of distribution must be effected at the distributing box requiring that the machine tender work in this atmosphere and necessitating loss of time in climbing back and forth between the vats and distributing box to determine whether the stock is being properly distributed. Additionally, such wherein, forthe purpose of illustration. I have distributing boxes are open and the stock slopping over the distributing dams splashes and collects upon the sides of the box above the liquid level therein and dries, forming flakes which subsequently often fall or are knocked off into the stock which is being delivered to the screen. This system requires laborious cleansing at least on weekends.

An important object of this invention is the provis on of a distribution system which will enable admixture of the stock and white water, which usually takes place in such distributing boxes, to be individually controlled for each vat at a point immediately adjacent to the vat and readily accessible from the machine floor.

Another object of the invention is to provide a sysem in which the admixture occurs in a closed system whe e the stock is not exposed to the air and in which, accordingly. drying and flaking of the stock, such as ordinarily occurs, is eliminated.

Another ob ect is to prov de a. system fully submerged on both sides of each control gate, or oriflee: all parts being under constant pressure and control and always wet. whether in use or not, so as to be instantly available for change of grade.

A further object of the invention is the proand wherein:

Fig. 1 is a semi-diagrammatic side elevation illustrating a stock control system constructed in accordance with my invention;

Fig.2 is a similar elevation showing the equipment associated with each vat;

Fig. 3 is a diagrammatic perspective showin the distribution system as applied to a pair 01 vats;

Fig. 4 is a side elevation of the control apparatus by means of which the distribution to any particular vat is regulated;

Fig. 5 is a section on line 5-5 of Fig. 4: and Fig.6 is a detail section view on line 8-6 of Fig. 4.

Referring now to the drawing and more particularly to Figs. 1, 2 and 3 thereof, the numerals Ill, Illa, Illb, I00 and llld indicate the cylinder mold vats of a cylinder paper machine, each of which has associated therewith a screen ll, mix box l2 and white water pump i3. As is usual, the stock and white water are fed to the screen from which the screened stock is delivered to the mix box from which, after the addition of bypass white water, it passes to the vat.

In accordance with my invention, stock is delivered from the machine chests I, only one of which is herein shown, by pumps-P through a series of parallel conduits, preferably three in number, indicated at i5, I61: and ifib, the conduit l5 being of relatively large size and being intended for the delivery of filler stock and the smaller conduits Ilia and 15b being intended for the delivery of two k nds of liner. These conduits extend longitudinally of the machine floor above and ad acent to the vats, being disposed at a convenient level for access from the machine floor F. The ends of the conduits di charge into head boxes IS, the purpose of which is to maintain against the stock a definite and predetermined head, the discharge from these head boxe being re urned to the mach ne chests.

In the con uit adjacent each vat there is provid d a multiple valve unit, generally designated at IT, this Unit being more clearly shown in Figs. 4, 5 and 6. The valve unit comprises a main casting having assa es at It. Illa and i8?) adapted to form continuations of the stock conduits it, 15a and I5b respectively, and a white water channel l9 extending transversely of stock channels it, Mia and 18b which is connected at one end to the outlet of the associated white water pump and at its opposite end to the intake of the mechanism. As at present shown, each of these valve elements is held against a seat 22 formed at the upper portion of the white water passage I 9 adjacent the opening by spring pressed followers 23 mounted in a. chamber 24 forming a portion of the lower end of the white water channel. Through the chamber 24 transversely of a passage and adjacent each valve element 2! an operating rod 25 is directed and packed to the walls of the chamber as by means of stufllng boxes is individually adjustable to suitable control 28. This operating rod is linked to the associated valve element 2| as at 21 and is provided with means as nut 28 for shifting the same longitudinally. Preferably, the rod has associated therewith an indicator pointer and a scale 30 to assist in determining the proper setting of the valve. The pressure delivered by the pump l3 will be less. than that of the stock in conduits I5, I5a,

I 5b as determined by head boxes is and the stock will consequently be fed into the white water through an open valve to an extent determined by the opening of the valve and difference in heads. By manipulation of the val e nt associated with each vat the machine tender can deliver the desired stock to the vat at the desired consistency and may, furthermore, effect the regulation while actually observing the vat.

It will be noted that the openings controlling the mixture of the stock and white water are continuously subjected to the action of these elements, the one (stock) being maintained at a given head by the head boxes l6, and the other (white water) by pressure of pumps l3. Accordingly, the proportioning of the stock occurs under conditions preventing the formation of lumps or aeration.

Since the arrangement herein illustrated is obviously capable oi considerable modification without departing from the spirit of my invention, I do not wish to be understood as limiting my-' seli thereto except as hereinafter claimed.

I claim:

1. An apparatus for controlling the supply of an aqueous dispersion of stock to a cylinder paper machine vat, comprising a circulating system for said dispersion including a. conduit for said aqueous dispersion, and means for maintaining said conduit full of said aqueous dispersion in motion under a predetermined pressure at all times; a white water circulating system including said vat, a white water conduit disposed in laterally abutting relation to said aqueous dispersion conduit, and means for maintaining said white water conduit full 01' said white water with said white water in motion through said white water conduit under predetermined pressure lower than the pressure of said aqueous dispersion in said aqueous dispersion conduit at all times; said conduits being directly connected by a short passage substantially perpendicular to the axes of said conduits and affording direct intercommunication therebetween; and a plate-like valve element operable transversely of said passage and 01 a thickness substantially corresponding to the total axial aaoauc active circulation through said conduits respec. tively.

2. An apparatus for controlling the supply of an aqueous dispersion of stock to a cylinder paper machine vat, comprising a circulating system for said dispersion including a conduit for said aqueous dispersion, and means for maintaining said conduit full of said aqueous dispersion in motion under a predetermined pressure at all times; a.

white water circulating system including said vat, v

duit full of said white water with said white water.

in motion through said white water conduit under predetermined pressure lower than the pressure of said aqueous dispersion in said aqueous dispersion conduit at all times; said conduits being arranged with said aqueous dispersion conduit in superposed relation to said white water conduit and directly connected thereto by a short passage substantially perpendicular to the axes of said conduits and aflording direct intercommunication therebetween; and a plate-like valve element operable transversely of said passage and of a thickness substantially corresponding to the total axial length of said passage to cause the opposite faces of said valve element at all times to be engaged and kept in a wet condition free of accumulations of said stock constantly by said aqueous dispersionand said white water being maintained in active circulation through said conduits respectively.

3. An apparatus for controlling the supply of an aqueous dispersion of stock to a cylinder paper machine vat, comprising a circulation system for said aqueous dispersion including a conduit for said aqueous dispersion, and means for maintaining said conduit full of said aqueous dispersion in motion under a predetermined pressure at all times; a white water circulating system including said vat, a. white water conduit disposed in laterally abutting right angular relation to said aqueous dispersion conduit, and means for maintaining said white water conduit full of said white water with said white water in motion through said white water conduit under predetermined pressure lower than the pressure of said aqueous dispersion in said aqueous dispersion conduit at all times; said conduits being directly connected by a short passage substantially perpenlength of said passage to cause the opposite faces of said valve element at all times to be engaged dicular to the axes of said conduits and affording direct intercommunication therebetween; and a. plate-like valve element operable transversely of said passage and of a thickness substantially corresponding to the total axial length of said passage to cause the opposite faces of said valve element at all times to be engaged and kept in a wet condition free of accumulations of said stock constantly by said aqueous dispersion and said white water being maintained in active circulation through said conduits respectively.

4. An apparatus for controlling the supply of an aqueous dispersion of stock to a cylinder paper machine vat, comprising a circulating system for said aqueous dispersion including a conduit of substantially circular cross-section for said aqueous dispersion, and means for maintaining said conduit full of said aqueous dispersion in motion under a predetermined pressure at all times; a white water circulating system including said vat, a white water conduit of substantially circular cross-section disposed in right angular substantially tangential relation to said aqueous dispersion conduit. and meant tor maintaining said white water conduit full or said white water with said white water in motion through said white water conduit under predetermined pressure lower than the pressure of said aqueous dispersion in said aqueous dispersion conduit at all times; said conduits being directly connected byv a short passage having, its axis disposed substan-- tially perpendicular to the axes of said conduits and aflording direct intercommunication thereopposite faces of said valve element at all times to be engaged and kept in a wet condition free of accumulations of said stock constantly by said aqueous dispersion and said white water beingiso maintained in active circulation through said conduits respectively.

5. An apparatus for controlling the supply of an aqueous dispersion of stock to a cylinder.

paper machine vat, comprising a circulating'sys- 26 tern for said aqueous dispersion including. a con duit of substantially circular cross-section for said aqueous dispersion, and means for maintaining said conduit full of said aqueous dispersion in motion under a predetermined pressure at all times; a white water circulatinz system including said vat, a white water conduit of substantially circular cross-section disposed in laterally abutting relation to said aqueous dispersion conduit, and means for maintaining said white water conduit full of said white water with said white water in motion through said white water conduit under predetermined pressure lower than the pressure of said aqueous dispersion in said aqueous dispersion conduit at all times; said conduits being directly connected by a short passage having its axis substantially perpendicular to the axes of said conduits and attending direct lnterc'ommunication therebetween. and a tubular valve element 

